Amplitude vs Mixpanel vs PostHog pricing compared across three different meters

Amplitude publishes four plans and prices one of them. Free includes 2 million events a month, 10,000 session replays and, unusually for this category, the full platform. Plus starts at $0 with the first 2 million events free, and the annual ladder behind its pricing chart, re-read on 22 September 2026, runs $900 a year at 3 million monthly events, $2,700 at 5 million, $6,912 at 10 million and $15,120 at 20 million. That is about 7 to 7.5 cents per 1,000 events above the free allowance. On 2 September the same page printed Plus from $49 a month, so the entry price moved inside three weeks. Growth and Enterprise are quote-only, with 20,000 and 50,000 session replays respectively and an add-on beyond that.

The detail worth carrying into a budget is that every Amplitude plan includes unlimited seats. That is genuinely unusual and it changes how the tool gets used: nobody has to justify a licence, so product, support and customer success can all look at the same screen. It also means your bill tracks how busy your product is rather than how big your company is, which suits B2B, where a small number of accounts can be worth a lot without generating much event volume.

What inflates an Amplitude bill is instrumentation, not headcount. An over-eager tracking plan that fires on scroll and hover will burn through 2 million events quickly for no analytical gain. That is a decision inside your control, and it is worth making deliberately before you start rather than auditing later.

Amplitude's own pricing page frames Plus as being without overage penalties or renewal spikes. Treat that as a claim to verify in the contract rather than a feature, because the published ladder stops at 20 million events and the page does not say what an event costs above it.

Mixpanel publishes a Free plan covering up to 1 million events a month, a Growth plan that starts at $0 and scales on a slider up to 20 million events, and a quote-only Enterprise plan. Annual billing is advertised on the pricing page as saving $480 a year.

The $0 start is the part that misleads people. It is not a second free tier. It is the bottom of a slider, and the number moves as soon as your volume does. If you want a real figure you have to open the estimator and put your own event count in, which is more honest than a fake headline price but makes Mixpanel the hardest of the three to compare on paper.

There is a startup offer worth knowing about if you qualify. Mixpanel's page states that companies founded less than five years ago, with up to $8 million in total funding, that have not redeemed another offer, get their first year free on the Startup plan. That is a real saving, and it is also the classic way a tool becomes load-bearing before anyone has priced year two. Model what year two looks like at your projected volume before you build reporting on top of it.

The B2B limitation is Group Analytics. Mixpanel's documentation describes it as an add-on package for Growth and Enterprise customers, which means it is not available on Free at all. You cannot evaluate account-level reporting before you start paying, and Mixpanel does not publish the add-on price.

PostHog has no plans in the normal sense. Its billing API returns fifteen separately metered products, each with its own free allocation and its own per-unit rate, and your bill is the sum of whichever ones you turned on. There is no seat fee and no platform fee below a subscription.

Product analytics is the flagship meter: 1 million events a month free, then $0.00005 per event from 1 to 2 million, $0.0000343 to 15 million, $0.0000295 to 50 million and $0.0000218 to 100 million. Session replay is 5,000 recordings free then $0.005 each, falling to $0.0017 at volume. Surveys are 1,500 responses free then $0.10 each. Feature flags are 1 million requests free then $0.0001. Error tracking is 100,000 exceptions free then $0.00037. Data warehouse rows are 1 million free then $0.000015. All read from the billing API on 2 September 2026.

This is the most transparent pricing in the category and it is also the easiest to underestimate, for one structural reason: the free allocations do not pool. Fifteen generous free tiers look enormous until you switch on five products, at which point you have five meters running and five bills, and the analytics rate is no longer the number that matters.

Two details a B2B buyer should pull out before committing. Identified events are priced above anonymous ones, and in a logged-in B2B product almost every event is identified. And PostHog's documentation states that subscribing to the group analytics add-on applies billing to all identified events in the project, not only the events carrying group properties. Those two compound, so model them together rather than separately.

Nobody publishes it, which is itself the finding.

Amplitude's documentation states that it reports on individual users by default and that group-level analysis comes from the Accounts add-on. Mixpanel's documentation describes Group Analytics as an add-on package available to Enterprise or Growth customers. PostHog's documentation describes group analytics as a paid add-on and adds that subscribing repricing applies to every identified event in the project. Three vendors, three add-ons, zero published prices.

For a B2B company this is not a footnote. The account is the thing that renews, so account-level reporting is not an advanced feature, it is the basic unit of the question you are trying to answer. Budgeting from the plan card will therefore understate your real cost by an amount none of the three will tell you until you are in a sales conversation.

So ask for it explicitly, in writing, before you compare tiers. Three specific questions: what does the account or group add-on cost at our volume, is it available on the tier we are quoting or does it force an upgrade, and in PostHog's case what does enabling it do to the billing basis for identified events across the whole project. A vendor that will not put those answers in writing has told you something useful.

On the analytics meter alone, usually yes, and PostHog is the only one of the three that lets you check without talking to anybody.

At 15 million events a month, PostHog's published ladder puts the marginal rate at $0.0000343 per event, dropping to $0.0000295 above that. Amplitude's tiered ladder and Mixpanel's slider both stop publishing at 20 million, so above that line you are comparing a known number against two quotes. If price transparency is a procurement requirement, that alone decides it.

The answer changes when you count products rather than events. Amplitude includes session replay, A/B testing and feature flags inside the plan you already pay for, with replay capped per tier. PostHog charges for each of those separately: replay at $0.005 a recording after 5,000, feature flags after 1 million requests, surveys after 1,500 responses. A team that wants four of those capabilities can easily find PostHog's total above Amplitude's, even though its analytics rate is lower.

There is also a non-price factor that belongs in this comparison because it costs money later. PostHog's own documentation says self-hosting is unsupported, so the open-source positioning does not translate into a cheap self-run option. Budget for PostHog Cloud, not for a server you were planning to run yourself.

The short version: PostHog wins on a single-product bill and on transparency. Amplitude wins on bundle economics and on seats. Mixpanel wins if you qualify for the startup year and are comfortable pricing year two yourself.

Five questions, and the reason each one exists is that a real bill has diverged from a published price for somebody on exactly that point.

What does the account or group analytics add-on cost at our volume, and does it force a tier upgrade. All three sell it, none prices it.

What happens at renewal. A first-year discount, a startup programme or a promotional tier all renew at list, and list is often a large multiple of what you signed. Get year two in the same document as year one.

How is the meter defined, precisely. An event, a session and a monthly active user are not interchangeable, and at least one vendor in this category meters sessions without publishing what a session is. If the unit cannot be defined, the bill cannot be forecast.

What happens when we exceed the allowance: an overage charge, a hard stop, or a feature freeze. These are very different operational risks and vendors handle them very differently.

And what does it cost to get our data out. Export limits and warehouse sync pricing are where switching costs hide, and they are much easier to negotiate before you sign than after two years of history is inside somebody's system.